is interac?ve. Great for data analysis! • This may not seem like a big deal at first if you haven’t done a lot of data processing work, but it is! • Imagine the alterna?ve: – Edit the program file. – Run the program and look at the output text in a text editor. – Repeat endless ?mes. – And how do you visualize the data? Output to file and click to show on browser? – The iPython Notebook, along with pandas and matplotlib, provide a powerful combina?on of tools to itera?vely examine, process, and visualize data.